CA2026977A1 - Cable connector with a low inductance path - Google Patents
Cable connector with a low inductance pathInfo
- Publication number
- CA2026977A1 CA2026977A1 CA002026977A CA2026977A CA2026977A1 CA 2026977 A1 CA2026977 A1 CA 2026977A1 CA 002026977 A CA002026977 A CA 002026977A CA 2026977 A CA2026977 A CA 2026977A CA 2026977 A1 CA2026977 A1 CA 2026977A1
- Authority
- CA
- Canada
- Prior art keywords
- housing
- contact
- reference conductor
- signal
- cable connector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
- H01R24/28—Coupling parts carrying pins, blades or analogous contacts and secured only to wire or cable
- H01R24/30—Coupling parts carrying pins, blades or analogous contacts and secured only to wire or cable with additional earth or shield contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding
- H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
- H01R13/6581—Shield structure
- H01R13/6585—Shielding material individually surrounding or interposed between mutually spaced contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding
- H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
- H01R13/6591—Specific features or arrangements of connection of shield to conductive members
- H01R13/6592—Specific features or arrangements of connection of shield to conductive members the conductive member being a shielded cable
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2107/00—Four or more poles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
- H01R9/22—Bases, e.g. strip, block, panel
- H01R9/24—Terminal blocks
Landscapes
- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Connector Housings Or Holding Contact Members (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
- Multi-Conductor Connections (AREA)
Abstract
ABSTRACT:
A cable 3 connector 1 comprising, a housing block 2 and an electrical cable 3 having a signal wire 13 connected to a corresponding signal contact 4, and at least one reference wire 14 connect d to a reference conductor 5 extending beside the signal contact 4, a housing 6 coupled to the housing 6 block 2 and receiving the signal contact 4 in one of multiple contact positions 7 in the housing 6, and a reference contact 10 received in the housing 6 and connected to the reference conductor 5.
A cable 3 connector 1 comprising, a housing block 2 and an electrical cable 3 having a signal wire 13 connected to a corresponding signal contact 4, and at least one reference wire 14 connect d to a reference conductor 5 extending beside the signal contact 4, a housing 6 coupled to the housing 6 block 2 and receiving the signal contact 4 in one of multiple contact positions 7 in the housing 6, and a reference contact 10 received in the housing 6 and connected to the reference conductor 5.
Description
~ ~ f~ Pl CABLE CONNECTOR WITH A LOW INDUCTANCE PATH
The specification describes a cable connector and more particularly, a cable connector with a low inductance signal return path.
A known cable connector is disclosed in U.S.
Patent 4,602,831 and comprises, a housing block and an electrical cable having at least one signal wire connected to a corresponding signal contact on the housing block, and at least one referencs wire of the cable for connection to a reference electrical potential. The signal wires transmit electrical signals, either electrical power or electrical encoded signals. The reference electrical potential is ground voltage. Along the cable a reference conductor shields the signal wires ~rom undesired influence, such as electrostatic and electromagnel:ic coupling. In one form of cable, the reference conduc1:or is a conductive shield that encircles a corresponding signal wire. A re~erence wire in contact With the shielcl connects to the connector and to a reference e1ectrical potential present in the connector.
As the switching speeds of the signals becoma faster, there is a need for the signal contacts to become closer together, to shorten signal transmission paths between signal contacts, and to reduce an allocation of valuable space to be consumed by the contact spacing. The signal contacts are too close if l4676 CA
~ . . .
The specification describes a cable connector and more particularly, a cable connector with a low inductance signal return path.
A known cable connector is disclosed in U.S.
Patent 4,602,831 and comprises, a housing block and an electrical cable having at least one signal wire connected to a corresponding signal contact on the housing block, and at least one referencs wire of the cable for connection to a reference electrical potential. The signal wires transmit electrical signals, either electrical power or electrical encoded signals. The reference electrical potential is ground voltage. Along the cable a reference conductor shields the signal wires ~rom undesired influence, such as electrostatic and electromagnel:ic coupling. In one form of cable, the reference conduc1:or is a conductive shield that encircles a corresponding signal wire. A re~erence wire in contact With the shielcl connects to the connector and to a reference e1ectrical potential present in the connector.
As the switching speeds of the signals becoma faster, there is a need for the signal contacts to become closer together, to shorten signal transmission paths between signal contacts, and to reduce an allocation of valuable space to be consumed by the contact spacing. The signal contacts are too close if l4676 CA
~ . . .
2 ~ 7 they couple inductively and electrostatically, and produce cross talk and impedance mismatch.
As the switching speeds of the signals become faster, a further need exists to provide a low inductance return path in the connector, to control common impedance noise generation, and to establish coupling of each signal contact electromagnetically and electrostatically to the return path that is stronger than a similar coupling to other signal conductors, and to provicle an impedance that matches the impedance of other parts of alectrical circuits transmitting the signals, in order to reduce signal reflections.
However, such a return path in the connector consumes additional space, and imposes a limit upon the closeness of the signal contacts Thus a choice is presented, whether to eliminate a return path and risk undesired impedance mismatch and undesired coupling, or whether to provide adequat2 return paths and sacrifice valuable space to be consumed by increasing the contact spacing and by enlarging the connector.
A feature of the invention resides in a cable connector comprising, a housing coupled to a housing block and receiving a signal contact on the housing block in one of multiple contact positions in the housing, a reference contact being received in the housing and being connected to the reference conductor, and the reference conductor extending in the housing and beside each one of the multiple contact po~itions. An advantage of the invention i5 that the reference conductor extends a low inductance signal return path into the housing and beside each signal contact received in a corresponding one of the contact positions.
Another advantage of the invention is that the multiple contact positions can be c10s2 togetherf since they provide multiple choices for spacing apart signals that would be too close together if routed to directly adjacent contact positions. Another advantage of the invention resides in a cable connector that combines close together signal contact positions with a low inductance signal return path extending from a housing block to a housing and beside contact positions in the housing.
According to the known cable connector disclosed in U.S. Patent 4,602,831 ~ronts of the signal contacts extend beyond a ~ront of a ground contact and thereby lack coupling to an adjacent low inductanc~ signal return path.
Another ~eature of the invention resides in a cable connector having a reference conductor that extends uncovered along a housing block for nesting dixectly against another housing block on which are additional signal contacts. The advantaqes are, that the housing blocks are close together, and the signal contacts on the housing blocks are directly ad~acent and close 14676 C~
-4~
together without undue coupling with one another, because the reference conductor provides a common return path for signal contacts on one housing block, and provides a shield for each signal contact on the one housiny block from each signal contact on the adjacent housing block.
The invention will now be described by w~y of example with reference to the accompanying drawings.
In the drawings, Figure 1 is a perspective view with parts exploded of a cable connector.
Figure 2 is a plan view of a cable terminated with a housing block and electrical signal contacts and an electrical reference conductor.
Figure 3 is a side view o~ the structure shown in Figure 2.
Figure 4 is an end view o~ the structure shown in Fiqure 2 together with a duplicate of the structure.
Figure 5 is a perspectiv2 view of a housing.
Figure 6 is a ~ragmentary plan view of the housing shown in ~igura 5.
Figure 7 is a section view taken along the line 7-7 of Figure 6.
Figure 8 is a section view taken along the line 8-8 o~ Figure 6.
Figura 9 is a section view taken along the line 9-9 of Figure 6.
Figure 10 is a view similar to Figure 2, illustrating an alternative structure of signal contacts shown in Figure 2.
Figure 11 is a view similar to Figure 2, illustrating an alternative structure of a reference conductor shown in Figure 2.
Figure 12 is a view similar to Figure 2, illustrating an alternative structure of the reference conductor shown in Figure 2.
Figure 13 is a fragmentary perspective view of a circuit board with representative contact pins. .
With reference to Figures 1, 5 and 6, a cable connector 1 comprises, a housing block 2, at least one electrical cable 3 connected to signal contacts 4 and a reference conductor 5 extending beside the signal contacts 4, and a housing 6 having mult.iple contact positions 7 grouped in a row 8. All of the electrical cables 3 shown in Figure 1 can be bundled together and considered as a single, composite cable 3. All of the housing blocks 2 of the composite cable 3 are mountad together with the housing 6 and considered as a singla, composite housing block 2. The housing 6 is to be coupled to the housing block 2 and receives each signal contact 4 in one of the multiple contact positions 7 in the housing 6. The reference conductor 5 extends in the housing 6 beside each one of the multiple contact positions 7. The multiple contact positions 7 ara ' !
-6- 2 ~ 7 provided by cavities in the housing 6. A slot 9 in the housing 6 receives the reference conductor 5. A
reference contact 10 is received in the housing 6, along a passage 11, for exanple, in the housing 6, and is connected to the reference conductor 5. A finger 12 of the reference conductor 5 is connected to the reference contact lo.
A representative cable 3 is shown in Figures 2 and 10, and has at least one signal wire 13, although two signal wires 13 are shown, and at least one reference wire 14 for connection to an electrical reference potential, not shown. Each signal wire 13 is lnsulated and is connected to a corresponding signal contact 4 on the housing block 2 and provides a structure for disconnectable connection of the signal wire 13.
Conductive shielding 15 of the cable 3 encircles the signal wires 13 and engages the~ reference wire 14 that is uninsulated. The cable 3 can have other forms, in which the number of corresponding signal wires 13 varies, the number of corresponding re~erence wires 14 varies, and the shielding 15 may not be present or may encircl~ each signal wire 13 individually. The corresponding reference wire 14 referred to herein is any conductive part of a representative cable 3, such as the cable 3, intended to be connected electrically to a reference electrical potential, and comprise~ any one of the following, a separate re~erence wire 14 known a~ a 2Q~ '7 --7~
drain wire or a ground wire of the cable 3, a selected signal wire 13 of the cable 3 that is selected for connection to a reference electrical potential, or a conductive shielding 15 along the cable 3. The reference electrical potential can be elPctrical ground voltage or a voltage other than ground.
Each signal contact 4 includes a f~ont, electrical receptacle and a rear wire connecting portion 16 connected to a conductive portion of a corresponding signal wire 13. Each corresponding reference wire 14 is connected to a corresponding wire connecting portion 17 of the reference conductor 5. Means for connecting the signal wire 13 to the signal contact 4 or for connecting the reference conductor 5 to the reference wire 14 include a solder connection, a weld connection or a compression crimp connection.
The housing block 2 is an insulative plastics material, for example, that is injection molded or otherwise formed to cover the wire connecting portions and is solidified. The signal contacts 4 on the housing block 2 are held in position for alignment with corresponding contact positions in the housing 6. The reference conductor 5 is held in position for insertion into the housing 6 with the signal contacts 4.
The reference conductor 5 is a conductive, flat metal plate having a front that projects forward at least as far as the front of each signal contact 4. The r~
reference conductor 5 extends beside each signal contact 4 and provides an electrostatic and electromagnetic coupling across a coupling span bridging a space ~etween each signal contact 4 and the reference conductor 5.
Each of the signal contacts 4 and the contact positions are provided with a direct and strong coupling with the reference conductor 5. Thereby, the co~tact positions can be close to~ether along the row 8 without an intervening low inductance return path. Signals that would detrimentally couple if routed to diractly adjacent contact positions, can ~e spaced further apart by routing to other contact positions. There can even be an empty contact position 18, as shown in Figure 10, in phantom outline, separating a single signal wi.re 13 of a corresponding cable 3 from two signal wires 13 of another cable 3. Thus ~ the multiple contact positions 7 can be close together, since they provide multiple choices for spacing apart signa:Ls that would be too close together if routed to directly adjacent contact positions 7 in the same row 8.
The reference conductor 5 at the front is received in the housing 6 besida each of the multiple contact positions 7. Each reference contact 10 at the front is re¢eived in the housing 6 along the passaga 1~ in the housing 6, and is connected to the reference conductor 5. For example, the finger 12 is unitary with the reference contact 10 and the raference conductor 5.
7 ~
g Thus, the reference contact 10 is secured to the reference conductor 5. Further, the reference contact 10 is received by the housing 6 with the reference conductor 5.
The reference contact 10 can also be a separate part, as shown in Figure 12, and received in the housing 6 to make a disconnectable connection to, the reference conductor 5 as the reference conductor 5 is received by the housing 6. The reference contact 10 can be constructed with a rear facing, receptacle type electrical contact 19, similar to the front receptacle type electrical contact described previously. The reference contact 10, with its contact 13, is in the housing 6 and disconnectably connects to the reference conductor 5.
The reference contact 10 of` each of Figures 2 and 12, is positioned in the housing 6 externally of the coupling span between each contaat position and the reference conductor 5, advantageously allowing close spacing between the reference conductor 5 and each of the contact positions. The reference conductor 5 is in a plane, and the reference contact 10 is in the plane~
A lance 20 extends from each lateral edge of the reference conductor 5 and latches against an interior undercut wall 21, Figure 8, of the slot 9 in the housing 6. Since the signal contacts 4 and the reference conductor 5 project.forwardly outward from the housing 7 ~
block 2, the housing 6 includes rear projecting insulative walls 22 defining a cavity 23 receiving a respective reference conductor 5. Pairs of the insulative walls 22 cover both sides of the projecting front of the reference conductor 5 and become engaged against a front end of the housing block 2. The two outermost walls 22 are longer than the ~thers and do not engage the front end of a corresponding housing block 2.
Instsad, the longer walls 22 provide end walls of the housing 6.
An exterior of the reference conductor 5 extends uncoverecl along the housing block 2 and provides a shield for each signal contact 4 on the housing block 2 from detrimental electromagnetic and electrostatic voltages impressed on the exterior of the reference conductor 5. The uncovered exterior allows for nesting directly against another housing block 2 on which are additional signal contacts 4. The advantages are, that the housing blocks 2 are close together, and the signal contacts 4 on the housing blocks 2 are directly adjacent and close together without undue coupling with one another, because the reference conductor 5 provides a common return path ~or signal contacts 4 on one housing block 2, and provides a shield for each signal contact 4 on the one housing block 2 ~rom each signal contact 4 on the adjacent housing block 2. Thus, the multiple contact positions 7 are grouped in at least two rows 8 2 ~ 7 of multiple contact positions 7 in the housing 6, the reference conductor 5 extends between two rows of signal contacts 4 aligned with corresponding multiple contact positions 7, each row of signal contacts ~ is on a corresponding housing block 2, and the reference conductor 5 extends along the corresponding housing block 2 and between the rows of signal çontacts 4.
The reference conductor 5 is along a space 24, Figure 4, alongside adjacent housing blocks 2. The adjacent housing blocks 2 can be separate. Further, two, or more than two, housing blocks 2 can be unitary or otherwise joined together and formed with a corresponding space 24 between rows of the signal contacts 4. The space 24 is inset within an inset side of tha housing block 2 facing an adjacent housing block 2. The adjacent housing block 2 nests in the space 24 opposite the uncovered exterior of the reference conductor 5.
The housing 6 can be a haader type cable 3 connec~or 1 or a disconnectable cable 3 conneotor 1.
The housing 6, when serving as a header, is mounted on a circuit board 25, Figure 13, with conductive contact pins 26, 27 arranged, for example, in columns and rows.
Only a ~ew of the pins 26, 27 are shown in the Figure.
Some of the pins 2~, 27 are signal pins 26 that extend into corresponding contact positions 7 of the housing 6 for disconnectable connection with corresponding signal 2. ~3 ,~
contacts 4. Others are reference pins 27 connected to a reference el~ctrieal potential, not shown, for example, a circuit that extends along the circuit board 25. Each corresponding reference pin 27 extends into a corre-sponding passage 11 of the housing 6 for disconnectableconnection to a corresponding reference contact 10. The housing block 2 is assembled into the hgusing 6, to connect the signal pins 26 to corresponding signal wiras 13 of the cable 3, and to connect the reference pins 27 to the reference conductor 5 and to the corresponding reference wire 14 of the cable 3. The housing block 2, the cable 3, the signal contacts 4 and the reference conductor 5 are removable from the housing 6 for repair or replacement, leaving the housing 6 in place on the circuit board and serving as a header for the housing blocX 2.
The housing 6, when serving as a disconnectable cable 3 connector 1, is disconnectable from the corresponding pins 26, 27, together with the housing block 2, and remains coupled to the housing block 2.
Thereafter, the housing 6 can be separated from the housing block 2, the cable 3, the signal contacts 4 and the refer~nce eonductor 5 for ease in repair or replacement.
As shown in Figure 11, the reference conductor 5 can have the wire connecting portions 17 separate from corresponding reference wires 14. The reference wires 9 7 ~
14 can be connected to corresponding receptacla type, electrical contacts 28, similar to the receptacle type electrical contacts described previously. The receptacle type contacts 28 provide means for connecting the reference conductor 5 with the corresponding reference wires 14. Ths reference conductor 5 is then releasably held by the housing block 2 and the reference conductor 5 is disconnectably connected to the reference wires 14 by the contacts 28, and remains in place within the housing 6 when the housing block 2. The housing block 2 and the cable 3 and the signal contacts 4 are then disconnectable from the housing 6 and the reference conductor 5 for ease in repair or replacement.
As the switching speeds of the signals become faster, a further need exists to provide a low inductance return path in the connector, to control common impedance noise generation, and to establish coupling of each signal contact electromagnetically and electrostatically to the return path that is stronger than a similar coupling to other signal conductors, and to provicle an impedance that matches the impedance of other parts of alectrical circuits transmitting the signals, in order to reduce signal reflections.
However, such a return path in the connector consumes additional space, and imposes a limit upon the closeness of the signal contacts Thus a choice is presented, whether to eliminate a return path and risk undesired impedance mismatch and undesired coupling, or whether to provide adequat2 return paths and sacrifice valuable space to be consumed by increasing the contact spacing and by enlarging the connector.
A feature of the invention resides in a cable connector comprising, a housing coupled to a housing block and receiving a signal contact on the housing block in one of multiple contact positions in the housing, a reference contact being received in the housing and being connected to the reference conductor, and the reference conductor extending in the housing and beside each one of the multiple contact po~itions. An advantage of the invention i5 that the reference conductor extends a low inductance signal return path into the housing and beside each signal contact received in a corresponding one of the contact positions.
Another advantage of the invention is that the multiple contact positions can be c10s2 togetherf since they provide multiple choices for spacing apart signals that would be too close together if routed to directly adjacent contact positions. Another advantage of the invention resides in a cable connector that combines close together signal contact positions with a low inductance signal return path extending from a housing block to a housing and beside contact positions in the housing.
According to the known cable connector disclosed in U.S. Patent 4,602,831 ~ronts of the signal contacts extend beyond a ~ront of a ground contact and thereby lack coupling to an adjacent low inductanc~ signal return path.
Another ~eature of the invention resides in a cable connector having a reference conductor that extends uncovered along a housing block for nesting dixectly against another housing block on which are additional signal contacts. The advantaqes are, that the housing blocks are close together, and the signal contacts on the housing blocks are directly ad~acent and close 14676 C~
-4~
together without undue coupling with one another, because the reference conductor provides a common return path for signal contacts on one housing block, and provides a shield for each signal contact on the one housiny block from each signal contact on the adjacent housing block.
The invention will now be described by w~y of example with reference to the accompanying drawings.
In the drawings, Figure 1 is a perspective view with parts exploded of a cable connector.
Figure 2 is a plan view of a cable terminated with a housing block and electrical signal contacts and an electrical reference conductor.
Figure 3 is a side view o~ the structure shown in Figure 2.
Figure 4 is an end view o~ the structure shown in Fiqure 2 together with a duplicate of the structure.
Figure 5 is a perspectiv2 view of a housing.
Figure 6 is a ~ragmentary plan view of the housing shown in ~igura 5.
Figure 7 is a section view taken along the line 7-7 of Figure 6.
Figure 8 is a section view taken along the line 8-8 o~ Figure 6.
Figura 9 is a section view taken along the line 9-9 of Figure 6.
Figure 10 is a view similar to Figure 2, illustrating an alternative structure of signal contacts shown in Figure 2.
Figure 11 is a view similar to Figure 2, illustrating an alternative structure of a reference conductor shown in Figure 2.
Figure 12 is a view similar to Figure 2, illustrating an alternative structure of the reference conductor shown in Figure 2.
Figure 13 is a fragmentary perspective view of a circuit board with representative contact pins. .
With reference to Figures 1, 5 and 6, a cable connector 1 comprises, a housing block 2, at least one electrical cable 3 connected to signal contacts 4 and a reference conductor 5 extending beside the signal contacts 4, and a housing 6 having mult.iple contact positions 7 grouped in a row 8. All of the electrical cables 3 shown in Figure 1 can be bundled together and considered as a single, composite cable 3. All of the housing blocks 2 of the composite cable 3 are mountad together with the housing 6 and considered as a singla, composite housing block 2. The housing 6 is to be coupled to the housing block 2 and receives each signal contact 4 in one of the multiple contact positions 7 in the housing 6. The reference conductor 5 extends in the housing 6 beside each one of the multiple contact positions 7. The multiple contact positions 7 ara ' !
-6- 2 ~ 7 provided by cavities in the housing 6. A slot 9 in the housing 6 receives the reference conductor 5. A
reference contact 10 is received in the housing 6, along a passage 11, for exanple, in the housing 6, and is connected to the reference conductor 5. A finger 12 of the reference conductor 5 is connected to the reference contact lo.
A representative cable 3 is shown in Figures 2 and 10, and has at least one signal wire 13, although two signal wires 13 are shown, and at least one reference wire 14 for connection to an electrical reference potential, not shown. Each signal wire 13 is lnsulated and is connected to a corresponding signal contact 4 on the housing block 2 and provides a structure for disconnectable connection of the signal wire 13.
Conductive shielding 15 of the cable 3 encircles the signal wires 13 and engages the~ reference wire 14 that is uninsulated. The cable 3 can have other forms, in which the number of corresponding signal wires 13 varies, the number of corresponding re~erence wires 14 varies, and the shielding 15 may not be present or may encircl~ each signal wire 13 individually. The corresponding reference wire 14 referred to herein is any conductive part of a representative cable 3, such as the cable 3, intended to be connected electrically to a reference electrical potential, and comprise~ any one of the following, a separate re~erence wire 14 known a~ a 2Q~ '7 --7~
drain wire or a ground wire of the cable 3, a selected signal wire 13 of the cable 3 that is selected for connection to a reference electrical potential, or a conductive shielding 15 along the cable 3. The reference electrical potential can be elPctrical ground voltage or a voltage other than ground.
Each signal contact 4 includes a f~ont, electrical receptacle and a rear wire connecting portion 16 connected to a conductive portion of a corresponding signal wire 13. Each corresponding reference wire 14 is connected to a corresponding wire connecting portion 17 of the reference conductor 5. Means for connecting the signal wire 13 to the signal contact 4 or for connecting the reference conductor 5 to the reference wire 14 include a solder connection, a weld connection or a compression crimp connection.
The housing block 2 is an insulative plastics material, for example, that is injection molded or otherwise formed to cover the wire connecting portions and is solidified. The signal contacts 4 on the housing block 2 are held in position for alignment with corresponding contact positions in the housing 6. The reference conductor 5 is held in position for insertion into the housing 6 with the signal contacts 4.
The reference conductor 5 is a conductive, flat metal plate having a front that projects forward at least as far as the front of each signal contact 4. The r~
reference conductor 5 extends beside each signal contact 4 and provides an electrostatic and electromagnetic coupling across a coupling span bridging a space ~etween each signal contact 4 and the reference conductor 5.
Each of the signal contacts 4 and the contact positions are provided with a direct and strong coupling with the reference conductor 5. Thereby, the co~tact positions can be close to~ether along the row 8 without an intervening low inductance return path. Signals that would detrimentally couple if routed to diractly adjacent contact positions, can ~e spaced further apart by routing to other contact positions. There can even be an empty contact position 18, as shown in Figure 10, in phantom outline, separating a single signal wi.re 13 of a corresponding cable 3 from two signal wires 13 of another cable 3. Thus ~ the multiple contact positions 7 can be close together, since they provide multiple choices for spacing apart signa:Ls that would be too close together if routed to directly adjacent contact positions 7 in the same row 8.
The reference conductor 5 at the front is received in the housing 6 besida each of the multiple contact positions 7. Each reference contact 10 at the front is re¢eived in the housing 6 along the passaga 1~ in the housing 6, and is connected to the reference conductor 5. For example, the finger 12 is unitary with the reference contact 10 and the raference conductor 5.
7 ~
g Thus, the reference contact 10 is secured to the reference conductor 5. Further, the reference contact 10 is received by the housing 6 with the reference conductor 5.
The reference contact 10 can also be a separate part, as shown in Figure 12, and received in the housing 6 to make a disconnectable connection to, the reference conductor 5 as the reference conductor 5 is received by the housing 6. The reference contact 10 can be constructed with a rear facing, receptacle type electrical contact 19, similar to the front receptacle type electrical contact described previously. The reference contact 10, with its contact 13, is in the housing 6 and disconnectably connects to the reference conductor 5.
The reference contact 10 of` each of Figures 2 and 12, is positioned in the housing 6 externally of the coupling span between each contaat position and the reference conductor 5, advantageously allowing close spacing between the reference conductor 5 and each of the contact positions. The reference conductor 5 is in a plane, and the reference contact 10 is in the plane~
A lance 20 extends from each lateral edge of the reference conductor 5 and latches against an interior undercut wall 21, Figure 8, of the slot 9 in the housing 6. Since the signal contacts 4 and the reference conductor 5 project.forwardly outward from the housing 7 ~
block 2, the housing 6 includes rear projecting insulative walls 22 defining a cavity 23 receiving a respective reference conductor 5. Pairs of the insulative walls 22 cover both sides of the projecting front of the reference conductor 5 and become engaged against a front end of the housing block 2. The two outermost walls 22 are longer than the ~thers and do not engage the front end of a corresponding housing block 2.
Instsad, the longer walls 22 provide end walls of the housing 6.
An exterior of the reference conductor 5 extends uncoverecl along the housing block 2 and provides a shield for each signal contact 4 on the housing block 2 from detrimental electromagnetic and electrostatic voltages impressed on the exterior of the reference conductor 5. The uncovered exterior allows for nesting directly against another housing block 2 on which are additional signal contacts 4. The advantages are, that the housing blocks 2 are close together, and the signal contacts 4 on the housing blocks 2 are directly adjacent and close together without undue coupling with one another, because the reference conductor 5 provides a common return path ~or signal contacts 4 on one housing block 2, and provides a shield for each signal contact 4 on the one housing block 2 ~rom each signal contact 4 on the adjacent housing block 2. Thus, the multiple contact positions 7 are grouped in at least two rows 8 2 ~ 7 of multiple contact positions 7 in the housing 6, the reference conductor 5 extends between two rows of signal contacts 4 aligned with corresponding multiple contact positions 7, each row of signal contacts ~ is on a corresponding housing block 2, and the reference conductor 5 extends along the corresponding housing block 2 and between the rows of signal çontacts 4.
The reference conductor 5 is along a space 24, Figure 4, alongside adjacent housing blocks 2. The adjacent housing blocks 2 can be separate. Further, two, or more than two, housing blocks 2 can be unitary or otherwise joined together and formed with a corresponding space 24 between rows of the signal contacts 4. The space 24 is inset within an inset side of tha housing block 2 facing an adjacent housing block 2. The adjacent housing block 2 nests in the space 24 opposite the uncovered exterior of the reference conductor 5.
The housing 6 can be a haader type cable 3 connec~or 1 or a disconnectable cable 3 conneotor 1.
The housing 6, when serving as a header, is mounted on a circuit board 25, Figure 13, with conductive contact pins 26, 27 arranged, for example, in columns and rows.
Only a ~ew of the pins 26, 27 are shown in the Figure.
Some of the pins 2~, 27 are signal pins 26 that extend into corresponding contact positions 7 of the housing 6 for disconnectable connection with corresponding signal 2. ~3 ,~
contacts 4. Others are reference pins 27 connected to a reference el~ctrieal potential, not shown, for example, a circuit that extends along the circuit board 25. Each corresponding reference pin 27 extends into a corre-sponding passage 11 of the housing 6 for disconnectableconnection to a corresponding reference contact 10. The housing block 2 is assembled into the hgusing 6, to connect the signal pins 26 to corresponding signal wiras 13 of the cable 3, and to connect the reference pins 27 to the reference conductor 5 and to the corresponding reference wire 14 of the cable 3. The housing block 2, the cable 3, the signal contacts 4 and the reference conductor 5 are removable from the housing 6 for repair or replacement, leaving the housing 6 in place on the circuit board and serving as a header for the housing blocX 2.
The housing 6, when serving as a disconnectable cable 3 connector 1, is disconnectable from the corresponding pins 26, 27, together with the housing block 2, and remains coupled to the housing block 2.
Thereafter, the housing 6 can be separated from the housing block 2, the cable 3, the signal contacts 4 and the refer~nce eonductor 5 for ease in repair or replacement.
As shown in Figure 11, the reference conductor 5 can have the wire connecting portions 17 separate from corresponding reference wires 14. The reference wires 9 7 ~
14 can be connected to corresponding receptacla type, electrical contacts 28, similar to the receptacle type electrical contacts described previously. The receptacle type contacts 28 provide means for connecting the reference conductor 5 with the corresponding reference wires 14. Ths reference conductor 5 is then releasably held by the housing block 2 and the reference conductor 5 is disconnectably connected to the reference wires 14 by the contacts 28, and remains in place within the housing 6 when the housing block 2. The housing block 2 and the cable 3 and the signal contacts 4 are then disconnectable from the housing 6 and the reference conductor 5 for ease in repair or replacement.
Claims (10)
1. A cable connector comprising, a housing block and an electrical cable having at least one signal wire connected to a corresponding signal contact on the housing block, and at least one reference wire of the cable for connection to a reference electrical potential, characterized by; a reference conductor extending beside the signal contact and connected to the reference wire, a housing coupled to the housing block and receiving the signal contact in one of multiple contact positions in the housing, a reference contact received in the housing and connected to the reference conductor, and the reference conductor extending in the housing beside each one of the multiple contact positions.
2. A cable connector as recited in Claim 1 further characterized by; a reference contact connected to the reference conductor and positioned in the housing externally of a coupling span between each contact position and the reference conductor.
3. A cable connector as recited in Claim 1, further characterized by; an exterior of the reference connector extending uncovered along the housing block and providing a shield for each signal contact on the housing block from detrimental electromagnetic and electrostatic voltages.
4. A cable connector as recited in claim 1, further characterized in that; the reference conductor disconnects from the housing block and the reference conductor upon separation of the housing block from the housing.
5. A cable connector as recited in claim 1, further characterized in that; the reference contact is secured to the reference conductor and is received by the housing with the reference conductor.
6. A cable connector as recited in claim 1, further characterized in that; the reference contact is in the housing and disconnectably connects to the reference conductor.
7. A cable connector as recited in claim 1, further characterized in that: the reference conductor is in a plane, and the reference contact is in the plane.
8. A cable connector as recited in claim 1, further characterized in that; the reference conductor projects forwardly from the housing block and beside the corresponding signal contact that projects forwardly from the housing block.
9. A cable connector as recited in claim 1, further characterized in that; the multiple contact positions are grouped in at least two rows of multiple contact positions in the housing, the reference conductor extends between two rows of signal contacts aligned with corresponding multiple contact positions, each row of signal contacts is on a corresponding housing block, and the reference conductor extends along the corresponding housing block and between the rows of signal contacts.
10. A cable connector as recited in claim 1, further characterized in that; at least two housing blocks are joined together and formed with a corresponding space between rows of the signal contacts, and the reference conductor is in the space.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/430,701 US4984992A (en) | 1989-11-01 | 1989-11-01 | Cable connector with a low inductance path |
| US07/430,701 | 1989-11-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2026977A1 true CA2026977A1 (en) | 1991-05-02 |
Family
ID=23708653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002026977A Abandoned CA2026977A1 (en) | 1989-11-01 | 1990-10-04 | Cable connector with a low inductance path |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4984992A (en) |
| EP (1) | EP0426348B1 (en) |
| JP (1) | JP3017791B2 (en) |
| BR (1) | BR9005469A (en) |
| CA (1) | CA2026977A1 (en) |
| DE (1) | DE69021828T2 (en) |
| ES (1) | ES2075884T3 (en) |
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-
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- 1989-11-01 US US07/430,701 patent/US4984992A/en not_active Expired - Lifetime
-
1990
- 1990-10-04 CA CA002026977A patent/CA2026977A1/en not_active Abandoned
- 1990-10-22 EP EP90311545A patent/EP0426348B1/en not_active Expired - Lifetime
- 1990-10-22 DE DE69021828T patent/DE69021828T2/en not_active Expired - Lifetime
- 1990-10-22 ES ES90311545T patent/ES2075884T3/en not_active Expired - Lifetime
- 1990-10-29 BR BR909005469A patent/BR9005469A/en not_active IP Right Cessation
- 1990-11-01 JP JP2297024A patent/JP3017791B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP3017791B2 (en) | 2000-03-13 |
| EP0426348A1 (en) | 1991-05-08 |
| JPH03155077A (en) | 1991-07-03 |
| US4984992A (en) | 1991-01-15 |
| ES2075884T3 (en) | 1995-10-16 |
| EP0426348B1 (en) | 1995-08-23 |
| DE69021828D1 (en) | 1995-09-28 |
| DE69021828T2 (en) | 1996-04-18 |
| BR9005469A (en) | 1991-09-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 19981005 |